HP VAN SDN Controller Administrator Guide v3

9 Troubleshooting
9.1 Host location not learned by controller
In a topology where two or more controlled switches connect to the same uncontrolled switch, the
controller will not learn the location of hosts connected to the uncontrolled switch.
9.2 Unexpected network or service problem
Changing the hybrid.mode configuration without also restarting the controller and disabling, then
re-enabling each controlled OpenFlow instance in the OpenFlow switches can result in network or
service problems. Refer to “Hybrid mode for controlling packet-forwarding” (page 75) for how to
properly change the hybrid.mode configuration.
100 Troubleshooting